A kinetics study on PbGeO3 solid-solid phase transition was realised by means of differential scanning calorimetry and time-resolved X-ray powder diffraction. Isothermal and non-isothermal Johnson-Mehl-Avrami equations were applied to obtain both the activation energy Ea and the Avrarmi coefficient n. The latter parameter has been related to morphological evidences collected by scanning electron microscopy. The limits of the applied theory, i.e., the Arrhenian behaviour of the growth rate and a steady-state nucleation rate, are finally discussed in terms of recent theoretical developments.
Isothermal and non-isothermal kinetic study of the PbGeO3 solid-solid phase transition / C. Tomasi, M. Scavini, A. Cavicchioli, A. Speghini, M. Bettinelli. - In: THERMOCHIMICA ACTA. - ISSN 0040-6031. - 432:1(2005 Jul 01), pp. 2-9.
Isothermal and non-isothermal kinetic study of the PbGeO3 solid-solid phase transition
M. ScaviniSecondo
;
2005
Abstract
A kinetics study on PbGeO3 solid-solid phase transition was realised by means of differential scanning calorimetry and time-resolved X-ray powder diffraction. Isothermal and non-isothermal Johnson-Mehl-Avrami equations were applied to obtain both the activation energy Ea and the Avrarmi coefficient n. The latter parameter has been related to morphological evidences collected by scanning electron microscopy. The limits of the applied theory, i.e., the Arrhenian behaviour of the growth rate and a steady-state nucleation rate, are finally discussed in terms of recent theoretical developments.
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